US2778383A - Loose thread winding up and stretching device for automatic looms - Google Patents

Description

`Ian. 22, 1957 N. BRUNNER 2,778,383

LOOSE THREAD WINDING UP AND STRETCHING DEVICE FOR AUTOMATIC LOOMS Filed Feb. 18, 1954 LoosE rrrREAD wiNDlNlG UP AND STRETCHING DEVICE Fon AUTOMATIC LooMs Niklaus Brunner, Arbon, Switzerland, assignor to Societe Anonyme Adolphe Saurer, Arbon, Switzerland, a jointstock company of Switzerland Application February 18, 1954, Serial No. 411,200

Claims priority, application Switzerland April 8, 1953 Claims. (Cl. 139-260) This invention relates to automatic looms and more especially to a device for removing the loose piece of thread which extends during the pirn exchange between the fabric border and the shuttle.

It is an object of this invention to provide means serving this purpose which are simple and can be fabricated at low cost.

In the device according to this invention a gripper serving to catch the piece of thread cut oli near the end of the pirn can be moved from the position of gripping towards a rotary member having a friction-increasing surface and forces the loose end of the thread against this member, to be held and stretched by it and, after cutting, be wound up upon it.

I prefer using a rotary member of cylindrical shape carrying bristles and being rotated intermittently.

ln the drawings ailixed to this speciiication and forming part thereof an embodiment of this invention is illustrated diagrammatically by way of example.

In the drawingsl Fig. 1 is a plan view of the device in which the shuttle box is shown as being arranged on the side where the pirns are exchanged.

Fig. 2 is another view of the power part of Fig. l with certain parts being removed to show the parts arranged below them.

Fig. 3 is a vertical section along the line Ill- III in Fig. l.

Referring to the drawings, 1 is the slay and 2 is an arm mounted on one side of it and carrying the shuttle box 3 in which is shown a shuttle 4 with a bobbin S in it. The weft thread 6 extends sideways of the threader (not shown) along the shuttle towards the fabric border 7 where 8 denotes the spreader, 9 being the shears. On the slay 1 is fixed an arm 10.

In bearings 13 mounted on the loom frame 12 is supported the adjusting rod 14 which, in a well known manner, is connected with the device (not shown) for starting the pirn exchange in the shuttle 4. The rod 14 has mounted thereon an arm 15 which isconnected by means of a link 16 with the arm 17 of a double-armed lever arranged on the arm 2li. This double-armed lever can be rocked in a plane which extends at least approximately normal to the shuttle race. The arm 18 has its lower end formed as a gripper 19, having a nose 23 and a baille 24. The funnel-shaped opening 22 between these two members ends in an enlargement 25.

On the loom frame 12 is further mounted the bracket 3i) gripping a bolt 31. The double-armed lever 32 is mounted on this bolt 31 for rocking movement. The bracket 30 is formed with a nose-shaped projection 33 which forms an abutment for the pin 34 mounted on the short arm of the lever 32. A spring 35 extending between the loom frame 12 and the pin 34 tends to turn the lever 32 around the bolt 31 in clockwise direction. Above the lever 32 is mounted the toothed disc 37 on which is fixed a pin 38. On this pin rides the cylindrical Patented Jan. 22, 1957 ICC 2 thread holder 41 which carries bristles 40 on its suirace. On the bracket 30 and also on the lever 32 are mounted pawls 42 and 43 for rotation about pins 44 and 45, respectively. The pawls 42 and 43 are pulled towards the toothed disc 374by means of springs 46 and 47, respectively. A cap 49 serves as a protector for the thread holder drive.

The device here described operates as follows:

When the loom is in operation, the gripper 19 and the members cooperating with it are in the position shown on the drawing in dash lines. During a pirn exchange the adjusting rod 14 is turned relative to Fig. 3 in clockwise direction, thereby carrying the gripper 19 from its position shown in dash lines in Figs. 1 and 3 into the position shown in full lines, whereby the thread 6 extending from the fabric border 7 to the bobbin 5 is carried through the opening between the nose 23 and the baille 24 and is placed in the enlarged opening 25. While thereupon the rod 14 is turned back in a well known manner in counter-clockwise direction, it carries along, by way of the arm 15 and the link 16 the doublearmed lever 17, 18 whereby the gripper 19 returns into its initial position shown in dash lines, to remain in this position until the next pirn exchange. During its return movement the gripper 19 pulls the thread 6 which had been cut oil near the shuttle 4, against the bristles 40 of the thread holder and the thread 6 now extends in the position shown in dot-and-dash lines.

As shown in Figs. l and 2, the arm lil, during the latter part of the striking position of the slay 1, contacts the left-hand arm of the lever 32 which is now turned in the counter-clockwise position and tensions the spring 35. The toothed disc 37 and the thread holder 41 mounted on it are prevented, by the action of the pawl 42, from being carried along in the counter-clockwise direction. On the other hand, when the slay 1 goes through its return movement, the spring 35 causes the lever 32 to turn and the pawl 43 causes the toothed disc 37 to turn in the clockwise direction until the pin 34 meets the nose 33 on the bracket 3i). Thus, the thread holder 41 is turned only by the spring 35. After some shuttle flights the spreader shears 9 cuts the thread 6 near the fabric border 7 so that the thread 6 is wound around the thread holder 41. The thread holder 41 can be lifted oil the disc 37 and another one mounted in its place, if desired.

I wish it to be understood that I do not desire to be limited to the details described in the foregoing speciilcation and shown in the drawings, for obvious modifications will occur to a person skilled in the art.

l claim:

l. A device for winding up and stretching the loose ends of the weft thread in automatic looms, comprising in combination a 'thread gripper, a rotary member with a roughened surface, means for moving said gripper with the loose thread end toward and into contact with said member and to present said thread to said member in a position to be wound around it and be stretched and means for then cutting said stretched thread.

2. A device for removing the loose ends of the weft thread in automatic looms, comprising in combination a thread gripper, a rotary cylindrical brush with a roughened surface, means for moving said gripper with the loose thread end toward and into contact with said cylindrical brush and to present said loose end to said brush to be wound around said cylindrical brush and be stretched and means for then cutting said stretched thread.

3. A device for removing the loose ends of the weft thread in automatic looms, comprising in combination a thread gripper, a rotary member with a roughened surface, means for intermittently moving said gripper With the loose thread end toward and into contact with said member so as to present said loose end of said thread to said member to be wound around said member and be stretched and means for then cutting said stretched thread.

4. The device of ciairn 1, in which means comprising a toothed disc and a pawl arranged for rotating said disc are provided to wind the thread onto said rotary member.

5. The device of claim 1, in which the gripper is a lever and the means for moving it are arranged to rock References Cited in the tile of this patent UNITED STATES PATENTS 979,779 Marcure Dec. 27, 1910 1,808,127 BanaganY June 2, 1931 1,967,510 Llewillyn July 24, 1934 FOREIGN PATENTS 26,311 France Nov. 6, 1923

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